/**
* v-copyText 复制文本内容
* Copyright (c) 2022 ruoyi
*/

export default {
    beforeMount(el, { value, arg }) {
      if (arg === "callback") {
        el.$copyCallback = value;
      } else {
        el.$copyValue = value;
        const handler = () => {
          copyTextToClipboard(el.$copyValue);
          if (el.$copyCallback) {
            el.$copyCallback(el.$copyValue);
          }
        };
        el.addEventListener("click", handler);
        el.$destroyCopy = () => el.removeEventListener("click", handler);
      }
    }
  }
  
  function copyTextToClipboard(input, { target = document.body } = {}) {
    const element = document.createElement('textarea');
    const previouslyFocusedElement = document.activeElement;
  
    element.value = input;
  
    // Prevent keyboard from showing on mobile
    element.setAttribute('readonly', '');
  
    element.style.contain = 'strict';
    element.style.position = 'absolute';
    element.style.left = '-9999px';
    element.style.fontSize = '12pt'; // Prevent zooming on iOS
  
    const selection = document.getSelection();
    const originalRange = selection.rangeCount > 0 && selection.getRangeAt(0);
  
    target.append(element);
    element.select();
  
    // Explicit selection workaround for iOS
    element.selectionStart = 0;
    element.selectionEnd = input.length;
  
    let isSuccess = false;
    try {
      isSuccess = document.execCommand('copy');
    } catch { }
  
    element.remove();
  
    if (originalRange) {
      selection.removeAllRanges();
      selection.addRange(originalRange);
    }
  
    // Get the focus back on the previously focused element, if any
    if (previouslyFocusedElement) {
      previouslyFocusedElement.focus();
    }
  
    return isSuccess;
  }